| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.android.timezone.distro.tools; |
| |
| import com.android.timezone.distro.DistroException; |
| import com.android.timezone.distro.DistroVersion; |
| import com.android.timezone.distro.TimeZoneDistro; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.nio.charset.StandardCharsets; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipOutputStream; |
| |
| /** |
| * A class for creating a {@link TimeZoneDistro} containing timezone update data. Used in real |
| * distro creation code and tests. |
| */ |
| public final class TimeZoneDistroBuilder { |
| |
| /** |
| * An arbitrary timestamp (actually 1/1/2017 00:00:00 UTC) used as the modification time for all |
| * files within a distro to reduce unnecessary differences when a distro is regenerated from the |
| * same input data. |
| */ |
| private static long ENTRY_TIMESTAMP = 1483228800000L; |
| |
| private DistroVersion distroVersion; |
| private byte[] tzData; |
| private byte[] icuData; |
| private String tzLookupXml; |
| |
| public TimeZoneDistroBuilder setDistroVersion(DistroVersion distroVersion) { |
| this.distroVersion = distroVersion; |
| return this; |
| } |
| |
| public TimeZoneDistroBuilder clearVersionForTests() { |
| // This has the effect of omitting the version file in buildUnvalidated(). |
| this.distroVersion = null; |
| return this; |
| } |
| |
| public TimeZoneDistroBuilder replaceFormatVersionForTests(int majorVersion, int minorVersion) { |
| try { |
| distroVersion = new DistroVersion( |
| majorVersion, minorVersion, distroVersion.rulesVersion, distroVersion.revision); |
| } catch (DistroException e) { |
| throw new IllegalArgumentException(); |
| } |
| return this; |
| } |
| |
| public TimeZoneDistroBuilder setTzDataFile(File tzDataFile) throws IOException { |
| return setTzDataFile(readFileAsByteArray(tzDataFile)); |
| } |
| |
| public TimeZoneDistroBuilder setTzDataFile(byte[] tzData) { |
| this.tzData = tzData; |
| return this; |
| } |
| |
| // For use in tests. |
| public TimeZoneDistroBuilder clearTzDataForTests() { |
| this.tzData = null; |
| return this; |
| } |
| |
| public TimeZoneDistroBuilder setIcuDataFile(File icuDataFile) throws IOException { |
| return setIcuDataFile(readFileAsByteArray(icuDataFile)); |
| } |
| |
| public TimeZoneDistroBuilder setIcuDataFile(byte[] icuData) { |
| this.icuData = icuData; |
| return this; |
| } |
| |
| public TimeZoneDistroBuilder setTzLookupFile(File tzLookupFile) throws IOException { |
| return setTzLookupXml(readFileAsUtf8(tzLookupFile)); |
| } |
| |
| public TimeZoneDistroBuilder setTzLookupXml(String tzlookupXml) { |
| this.tzLookupXml = tzlookupXml; |
| return this; |
| } |
| |
| // For use in tests. |
| public TimeZoneDistroBuilder clearIcuDataForTests() { |
| this.icuData = null; |
| return this; |
| } |
| |
| /** |
| * For use in tests. Use {@link #buildBytes()} for a version with validation. |
| */ |
| public byte[] buildUnvalidatedBytes() throws DistroException { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| try (ZipOutputStream zos = new ZipOutputStream(baos)) { |
| if (distroVersion != null) { |
| addZipEntry(zos, TimeZoneDistro.DISTRO_VERSION_FILE_NAME, distroVersion.toBytes()); |
| } |
| |
| if (tzData != null) { |
| addZipEntry(zos, TimeZoneDistro.TZDATA_FILE_NAME, tzData); |
| } |
| if (icuData != null) { |
| addZipEntry(zos, TimeZoneDistro.ICU_DATA_FILE_NAME, icuData); |
| } |
| if (tzLookupXml != null) { |
| addZipEntry(zos, TimeZoneDistro.TZLOOKUP_FILE_NAME, |
| tzLookupXml.getBytes(StandardCharsets.UTF_8)); |
| } |
| } catch (IOException e) { |
| throw new DistroException("Unable to create zip file", e); |
| } |
| return baos.toByteArray(); |
| } |
| |
| /** |
| * Builds a {@code byte[]} for a Distro .zip file. |
| */ |
| public byte[] buildBytes() throws DistroException { |
| if (distroVersion == null) { |
| throw new IllegalStateException("Missing distroVersion"); |
| } |
| if (icuData == null) { |
| throw new IllegalStateException("Missing icuData"); |
| } |
| if (tzData == null) { |
| throw new IllegalStateException("Missing tzData"); |
| } |
| return buildUnvalidatedBytes(); |
| } |
| |
| private static void addZipEntry(ZipOutputStream zos, String name, byte[] content) |
| throws DistroException { |
| try { |
| ZipEntry zipEntry = new ZipEntry(name); |
| zipEntry.setSize(content.length); |
| // Set the time to a fixed value so the zip entry is deterministic. |
| zipEntry.setTime(ENTRY_TIMESTAMP); |
| zos.putNextEntry(zipEntry); |
| zos.write(content); |
| zos.closeEntry(); |
| } catch (IOException e) { |
| throw new DistroException("Unable to add zip entry", e); |
| } |
| } |
| |
| /** |
| * Returns the contents of 'path' as a byte array. |
| */ |
| private static byte[] readFileAsByteArray(File file) throws IOException { |
| byte[] buffer = new byte[8192]; |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| try (FileInputStream fis = new FileInputStream(file)) { |
| int count; |
| while ((count = fis.read(buffer)) != -1) { |
| baos.write(buffer, 0, count); |
| } |
| } |
| return baos.toByteArray(); |
| } |
| |
| /** |
| * Returns the contents of 'path' as a String, having interpreted the file as UTF-8. |
| */ |
| private String readFileAsUtf8(File file) throws IOException { |
| return new String(readFileAsByteArray(file), StandardCharsets.UTF_8); |
| } |
| } |
| |